I have an old HP 5245L Nixie tube based counter measuring it’s own reference 10MHz internal OXCO oscillator. I then measure the output of the counters reference with an old HP 8595E Spectrum Analyzer, and told the analyzer to plot out the highest power frequencies detected, of course the highest power frequency it measures is 10.000000MHz @67.56DBm (via a electromechanical attenuator on the input of the analyzer)
Pretty amazing for a 60 year old frequency counter (and OXCO) and a 24 year old spectrum analyzer! Clearly shows the quality engineering and ingenuity of HP engineers back in the day.
To this day, this ingenuity still exists in the people at Keysight Technologies (Formerly Agilent and HP)
*Note this is a repost from earlier to remain within compliance with this subs rules
I have an old HP 5245L Nixie tube based counter measuring it’s own reference 10MHz internal OXCO oscillator. I then measure the output of the counters reference with an old HP 8595E Spectrum Analyzer, and told the analyzer to plot out the highest power frequencies detected, of course the highest power frequency it measures is 10.000000MHz @67.56DBm (via a electromechanical attenuator on the input of the analyzer)
Pretty amazing for a 60 year old frequency counter (and OXCO) and a 24 year old spectrum analyzer! Clearly shows the quality engineering and ingenuity of HP engineers back in the day.
To this day, this ingenuity still exists in the people at Keysight Technologies (Formerly Agilent and HP)
*Note this is a repost from earlier to remain within compliance with this subs rules
You know it’s sad when you guys say old this and old that and yet they are still in use in the us military as common standards